Machine tool



FIG. 1 is an oblique perspective view from the front of the machine tool;

FIG. 2 is an elevated front view of the machine tool shown in FIG. 1;

FIG. 3 is an elevated back view of the machine tool shown in FIG. 1;

FIG. 4 is an elevated left side view of the machine tool shown in FIG. 1;

FIG. 5 is an elevated right side view of the machine tool shown in FIG. 1; and,

FIG. 6 is a bottom plan view of the machine tool shown in FIG. 1. 

The ornamental design for a machine tool, as shown and described. 